join multiple values in CSV output

lib/AccountManager/App.pm

@@ -844,8 +844,8 @@ sub req_download_accounts {
             $account->displayName(),
             $account->givenName(),
             $account->mail(),
-            $account->eduPersonAffiliation(),
-            $account->eduPersonScopedAffiliation(),
+            join(', ', $account->eduPersonAffiliation()),
+            join(', ', $account->eduPersonScopedAffiliation()),
             $account->eduPersonPrincipalName(),
             $account->schacHomeOrganization(),
             $account->schacHomeOrganizationType(),